JAMES MILES FRANKARD
Pilots at Lk Blvd, Wilson, MN
License number
Minnesota A0621513
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
175 E Lake Blvd, Wilson, MN 55987
Professional information
Separation And Recovery Of Reusable Heavy Metal Hydroxides From Metal Finishing Wastewaters
US Patent:
4680126, Jul 14, 1987
Filed:
Feb 18, 1986
Appl. No.:
6/830532
Inventors:
James M. Frankard - Winona MN
Orville V. Broch - Winona MN
Orville V. Broch - Winona MN
International Classification:
C02F 162
US Classification:
210710
Abstract:
A method is disclosed for the elimination of hazardous metal wastewater and sludges by recovering the non-ferrous metals zinc, nickel, copper (II), cadmium or chromium (III) present in an aqueous sludge comprising mixed metal hydroxides by selectively precipitating the ferrous metal ions present while maintaining the non-ferrous metal ions in solution, isolating the precipitate and then precipitating the non-ferrous metal ions from solution.